You cannot "magically" download a certificate without a source. Here are common sources:
Most universities and companies have a "BYOD" (Bring Your Own Device) page with download links for .crt , .cer , or .pem files. download wifi certificate for android
Android uses certificates to verify the identity of the WiFi server you are connecting to. This prevents "Man-in-the-Middle" (MitM) attacks, where a malicious hotspot pretends to be your office or school network to steal your login credentials. You cannot "magically" download a certificate without a
In the world of networking, trust isn't earned; it’s inherited. At the top of the pyramid sits the —a digital "Godfather" that everyone agrees to trust. trust isn't earned
: Usually ends in .crt , .cer , .der , or .p12 .